**Resting Membrane Potential - Data**| Concentration (mM) | K⁺ Inside | K⁺ Outside | Na⁺ Inside | Na⁺ Outside | Membrane Voltage (mV) ||---------------------|-----------|------------|------------|-------------|-----------------------|| | 140 | 4 | 10 | 140 | -68.036 || | 140 | 100 | 10 | 140 | -22.5 || | 140 | 4 | 10 | 200 | -61.545 |**Questions**1. What was the effect of increasing extracellular K⁺ to 100 mM on the membrane's potential?2. Explain why the above change occurred. **Explanation of Data**This table represents the changes in membrane voltage (mV) with different ionic concentrations (in mM) inside and outside the cell. The first row is the baseline scenario, with typical K⁺ and Na⁺ distribution, showing a membrane voltage of -68.036 mV. The second row indicates an increase in extracellular K⁺ concentration to 100 mM, resulting in a membrane voltage shift to -22.5 mV. The third row examines an increase in extracellular Na⁺ to 200 mM, with the voltage changing to -61.545 mV.Readers are encouraged to consider how these changes affect the resting membrane potential, reflecting on the Nernst equation and the principles of ionic equilibrium across a cell membrane.

The "resting membrane potential" can be influenced by the concentration of charged ions present, by…

Answered: Questions 1. What was the effect of…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Q5.6. If calcium ions, each of which has a charge of +2 (Ca²+), moved INTO a neuron, and no other ions were moving, what would be TRUE? The area outside the neuron would be become more positively charged. The concentration of Ca²+ inside the cell would decrease. The neuron would become more negative. The neuron would become more positive. Submit
Q5.8. In a neuron with a Vm of 0, there is a high concentration of K* inside of the cell and a low concentration outside. Which statement below is TRUE? If K+ channels were open and the electrical forces were absent, diffusion would result in a net movement of K* out of the cell. If K+ channels were closed, Na* would flow into the neuron. If K+ channels were open and the effect of diffusion was absent, the electrical forces would move K+ out of the cell. The membrane potential would be at the K* equilibrium potential, because concentrations of K* are not balanced. Submit
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Questions 1. What was the effect of increasing extracellular K+ to 100 mM on the membrane's potential? 2. Explain why the above change occurred.